Which is a biotic factor operating within an ecosystem? A. the type of climate in a given region
B. the carnivores that consume other animals
C. the amount of helium gas in the air
D. the rate of flow of water in a river

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.

Name a brittle metal , which is used to galvanize iron

The term gas is limited to those substances that exist in the gaseous state at